.navbar {
  margin-bottom: 0;
  border-radius: 0;
  .navbar-brand {
    padding-top: 0;
    padding-bottom: 0;
  }
  .btn-qq {
    @height: 34px;
    width: @height;
    height: 34px;
    background-image: url("../img/qq_32x32.png");
    background-repeat: no-repeat;
    background-position: center;
  }
  .btn-weibo:extend(.navbar .btn-qq) {
    background-image: url("../img/weibo_32x32.png");
  }
}
